<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Detail</title>
</head>
<body>
<h3>书名为</h3>
<span>{{ book }}</span>
<ul>
  {% for item in heroes %}
    <li>
      <div>{{ item }} -- {{ item.hcomment }}</div>
    </li>
  {% empty %}
    <li>没有英雄信息</li>
  {% endfor %}
</ul>
</body>
</html>